基于PLC控制系统的手机触摸屏面板切割设计【说明书论文开题报告外文翻译】
收藏
资源目录
压缩包内文档预览：(预览前20页/共48页)
编号：10276593
类型：共享资源
大小：20.67MB
格式：ZIP
上传时间：2018-07-09
上传人：小***
认证信息
个人认证
林**（实名认证）
福建
IP属地：福建
50
积分
- 关 键 词：
-
基于
plc
控制系统
手机
触摸屏
面板
切割
设计
说明书
仿单
论文
开题
报告
讲演
呈文
外文
翻译
- 资源描述：
-
基于PLC控制系统的手机触摸屏面板切割设计【说明书论文开题报告外文翻译】,基于,plc,控制系统,手机,触摸屏,面板,切割,设计,说明书,仿单,论文,开题,报告,讲演,呈文,外文,翻译
- 内容简介：
-
毕 业 设 计（论 文）任 务 书1本毕业设计（论文）课题应达到的目的：通过毕业设计，使学生受到电气工程师所必备的综合训练，在不同程度上提高各种设计及应用能力，具体包括以下几方面：1. 调查研究、中外文献检索与阅读的能力。2. 综合运用专业理论、知识分析解决实际问题的能力。3. 定性与定量相结合的独立研究与论证的能力。4. 实验方案的制定、仪器设备的选用、调试及实验数据的测试、采集与分析处理的能力。5. 设计、计算与绘图的能力，包括使用计算机的能力。6. 逻辑思维与形象思维相结合的文字及口头表达的能力。2本毕业设计（论文）课题任务的内容和要求（包括原始数据、技术要求、工作要求等）：1.本 课 题 要 求 利 用 所 学 的 专 业 知 识 ， 进 行 触 摸 屏 面 板 切 割 系 统 设 计 ， 系 统 要 求能 够 实 现 任 意 面 板 形 状 进 行 识 别 、 智 能 调 整 等 功 能 要 求 。2.设计系统的硬件电路和软件程序，包括详细的硬件设备配置，系统连接，程序调试等详细步骤；3.最终完成一篇符合金陵科技学院毕业论文规范的系统技术文档，包括各类技术资料，电路图纸，程序等；4.系统要有实际的硬件展示，并能够通电运行；5.本子系统要与整个系统能够配合运行；6.能够完成各项任务，参加最后的毕业设计答辩。毕 业 设 计（论 文）任 务 书3对本毕业设计（论文）课题成果的要求包括图表、实物等硬件要求： 1.按期完成一篇符合金陵科技学院论文规范的毕业设计说明书（毕业论文） ，能详细说明设计步骤和思路；2.能有结构完整，合理可靠的技术方案；3.能有相应的电气部分硬件电路设计说明；4.有相应的图纸和技术参数说明。5.答辩时完成实际系统的运行和展示。4主要参考文献： 1 王文磊,徐汀荣. PLC 和 PC 基于工业以太网通信研究与实现J. 微计算机信息. 2006(13) 2 付忠仁,顾战松,顾涵. A985GOT 在工业控制系统中的应用J. 电气自动化. 2006(02) 3 耿良田. PLC 的现状及发展趋势J. 数字化工. 2005(08) 4 郑圣德. 平板显示技术论坛 触摸屏的类型用途及工艺流程J. 电子工艺技术. 2005(03) 5 黄建新,刘建群,旷辉,吴石林. 触摸屏与 PLC 组成的伺服电机控制系统J. 仪表技术与传感器. 2005(02) 6 杨守权. 用工业以太网构筑 PLC 通信系统J. 电气时代. 2005(01) 7 史殿义,刘吉东. PLC 的现状及发展分析J. 计算机与网络. 2004(22) 8 尹建威,祁海龙,何全武,刘建国,史忠欣. 工业以太网和 PLC 在高炉喷煤系统中的应用J. 工业控制计算机. 2004(08) 9 解昱坤,陆红艳. PLC 以太网通讯技术J. 电气时代. 2003(05) 10 冯冬芹,金建祥,褚健. Ethernet 与工业控制网络J. 仪器仪表学报. 2003(01) 11 冀钰,程耀瑜,方顺林,孙欢欢. 基于 PLC 的全自动对位贴合机的设计J. 山西电子技术. 2015(01) 12 贺星辰,杨录. 四通道电磁炮光电同步检测系统设计J. 自动化仪表. 2014(10) 13 冀钰,程耀瑜,方顺林. 全自动贴合机对位靶标的中心选取方法研究J. 山西电子技术. 2014(05) 14 马艳洁. PLC 在电气自动化中的应用研究J. 现代商贸工业. 2012(10) 15 张建军. 图像识别技术在全自动对位贴合机的应用J. 电子工艺技术. 2010(04) 毕 业 设 计（论 文）任 务 书5本毕业设计（论文）课题工作进度计划：2015.11.04-2015.11.282015.11.29-2015.12.162015.12.17-2016.01.102016.02.25-2016.03.092016.03.09-2016.04.282016.04.29-2016.05.092016.05.09-2016.05.132016.05.14-2016.05.21在毕业设计管理系统里选题与指导教师共同确定毕业设计课题查阅指导教师下发的任务书，准备开题报告提交开题报告、外文参考资料及译文、论文大纲进行毕业设计（论文） ，填写中期检查表，提交论文草稿等按照要求完成论文或设计说明书等材料,提交论文定稿教师评阅学生毕业设计；学生准备毕业设计答辩参加毕业设计答辩，整理各项毕业设计材料并归档所在专业审查意见：通过 负责人： 2016 年 1 月 14 日 毕 业 设 计（论文） 开 题 报 告 1结合毕业设计（论文）课题情况，根据所查阅的文献资料，每人撰写不少于1000 字左右的文献综述： 1、课题研究的背景与意义如今，触摸技术开始在手机市场大行其道，触屏手机更成为各大厂商竞争的焦点。现在触摸屏手机也几乎人手一部，代替了传统的按键手机。从手机的抗损性来考虑，电容触屏外层会使用玻璃。这样虽然不至于坚不可摧，而且有可能在严重冲击下碎裂，但玻璃对日常碰擦和污迹要好处理的多。而且玻璃外层更容易清洁。由于各手机外观的多样化，工程上需要将手机触摸屏的材料-玻璃切割成基于矩形，并在矩形的基础上产生多样化的形状来满足不同的制作需求。因此，需要各种切割设备。传统的手动切割设备有切割精度不高，且难以切割出复杂的形状。自动切割设备既能切割出复杂的形状，又能保证它的精度。所以对于高要求的玻璃切割一般都采用自动切割来代替手动切割。 PLC 是 80 年代发展起来的新一代工业控制装置,由于可靠性高、适应性好、抗干扰能力优、接口功能强、编程简单、直观以及模块化结构、使用方便等优点,在工业控制领域中得到了广泛应用。但 PLC 无法进行复杂的运算和显示各种实时控制图表,人机交互性差、管理人员不能及时了解现场情况。所以为了弥补 PLC 这方面的不足,在工业控制中 PLC 一般与计算机组成控制系统。PLC 作为下位机使用,用来完成输入输出控制、逻辑运算、数据采集及状态判别等工作。上位机一般用工业控制计算机来完成数据分析、计算、信息存储、状态显示、打印输出等功能。以实现对被控制系统的实时监控。这种监控系统将计算机与 PLC 结合起来,使两者优势互补,且能够充分利用个人计算机强大的人机接口功能、丰富的应用软件、低廉的价格,组成高性能价格比的 PC-PLC 监控管理系统。 2、国内外研究现状和发展趋势早期的 PLC 主要由分立元件和中小规模集成电路组成，可以完成简单的逻辑控制及定时、计数功能。20 世纪 70年代初出现了微处理器。人们很快将其引入可编程控制器，使 PLC 增加了运算、数据传送及处理等功能，完成了真正具有计算机特征的工业控制装置。20 世纪70 年代中末期，可编程控制器进入实用化发展阶段，计算机技术已全面引入可编程控制器中，使其功能发生了飞跃。20 世纪 80 年代初，可编程控制器在先进工业国家中已获得广泛应用。这个时期可编程控制器发展的特点是大规模、高速度、高性能、产品系列化。上世纪 80 年代至 90 年代中期，是 PLC 发展最快的时期，在这时期，PLC 在处理模拟量能力、数字运算能力、人机接口能力和网络能力得到大幅度提高，PLC 逐渐进入过程控制领域，在某些应用上取代了在过程控制领域处于统治地位的 DCS 系统。20 世纪末期，可编程控制器的发展特点是更加适应于现代工业的需要。目前，可编程控制器在机械制造、石油化工、冶金钢铁、汽车、轻工业等领域的应用都得到了长足的发展。我国可编程控制器的引进、应用、研制、生产是伴随着改革开放开始的。最初是在引进设备中大量使用了可编程控制器。接下来在各种企业的生产设备及产品中不断扩大了 PLC 的应用。21 世纪，PLC 会有更大的发展。从技术上看，计算机技术的新成果会更多地应用于可编程控制器的设计和制造上，会有运算速度更快、存储容量更大、智能更强的品种出现，从产品规模上看，会进一步向超小型及超大型方向发展，从产品的配套性上看，产品的品种会更丰富、规格更齐全，完美的人机界面、完备的通信设备会更好地适应各种工业控制场合的需求，从市场上看，各国各自生产多品种产品的情况会随着国际竞争的加剧而打破，会出现少数几个品牌垄断国际市场的局面，会出现国际通用的编程语言，从网络的发展情况来看，可编程控制器和其它工业控制计算机组网构成大型的控制系统是可编程控制器技术的发展方向。目前的计算机集散控制系统 DCS 中已有大量的可编程控制器应用。伴随着计算机网络的发展，可编程控制器作为自动化控制网络和国际通用网络的重要组成部分，将在工业及工业以外的众多领域发挥越来越大的作用。 3、课题研究的目的和内容 本课题采用的是 PLC 来切割手机屏幕的，实现了软件与硬件相结合的控制方法。采用红外线在线测量长宽尺寸或者触摸屏设定尺寸。控制部分采用西门子 S7-200 的 PLC，他负责对采集来的尺寸进行处理和对步进电机进行控制。红外线在线测量长宽尺寸，分别测量显示出物体的长度、宽度；检测距离：0-500mm;光轴间距：20mm.工作电源：24VDC;输出方式：1-5VDC 或 4-20mA 模拟量输出；RS485 通讯输出。 控制系统的设计，由硬件设计和设计两部分组成。其中，硬件设计主要包括尺寸采集系统、西门子 S7-200 控制模块、步进驱动与步进电机模块等功能模块的设计，以及硬件电路在电路板上的实现。软件设计包括对红外传感器和触摸屏采集过来的数据进行处理，然后使 PLC 进行输出。毕业设计是要求我们独立完成的设计，是让我们把所学理论应用到实际的设计和生产当中，设计的意义就在于能产生生产力。而这个课题与生活和生产非常接近，我想通过这个课题研究来增强我的综合能力。主要参考文献： 1李江全.组态软件 MCGS 从入门到监控应用 35例M北京.电子工业出版社 2015.9 2李金城.付忠明.三菱 FX 系列 PLC 定位控制应用技术M北京.电子工业出版社 2014.2 4 李金城.PLC 模拟量与通讯控制应用实践M北京.电子工业出版社 2011.1 5文杰 .三菱 PLC 电气设计与编程自学宝典M北京.中国电力出版社 2015.4 6李长军.曲海波.陈雅华.学PLC 技术M北京.中国电力出版社 2014.5 7张豪.三菱 PLC 应用案例解析M北京.中国电力出版社 2012.10 8Daniel E.Kandray,P.E.可编程自动化技术M北京.科技出版社 2014.1 9廖志浓.郭新年.PLC 原理及应用M北京.电子工业出版社 2010.9 10刘建华.张静之.传感器与 PLC 应用M北京.电子工业出版社 2009.7 毕 业 设 计（论文） 开 题 报 告 2本课题要研究或解决的问题和拟采用的研究手段（途径）： 本课题要研究或解决的问题？ 1、触摸屏与 PLC 的通讯 2、对红外传感器采集过来的数据进行处理 3、步进驱动器的设置 4、切割机运行方式，plc 控制系统如何让其实现。本课题拟采用的研究手段(途径） 。 1、收集、整理相关本毕业设计的资料，熟练掌握 PLC 以及本设计相关的红外传感器、电器元件的功能，做出设计方案，对各种方案进行比较，选出最优方案，做好设计准备。 2、定期向老师请教。 3、经常与同学讨论。 毕 业 设 计（论文） 开 题 报 告 指导教师意见：1对“文献综述”的评语：综述内容较为丰富，参考文献合理，概括了课题所包含的研究内容的相关背景、基础知识、发展现状等，同时还对本课题所研究的任务进行了一定的阐述，对本课题的研究有一定的指导意义。2对本课题的深度、广度及工作量的意见和对设计（论文）结果的预测：本课题研究的任务是基于 PLC 控制系统的手机触摸屏面板切割进行设计，应该说技术相对成熟，深度中等，但是涉及到的知识面较广，如果学生能认真对待，通过实例调研，查阅专业资料，相信能够实现最终的设计任务和结果，并对自己的专业应用能力是一个非常大的提高。3.是否同意开题： 同意 不同意指导教师： 2016 年 03 月 07 日所在专业审查意见：同意 负责人： 2016 年 03 月 08 日0译文题目： Industrial Circuits Application Note 工业电路应用笔记 Industrial Circuits Application NoteA stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied.Stepper Motor Advantagesand DisadvantagesAdvantages1. The rotation angle of the motor is proportional to the input pulse.2. The motor has full torque at stand still(if the windings are energized)3. Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 5% of a step and this error is non cumulative from one step to the next.4. Excellent response to starting/stopping/reversing.5. Very reliable since there are no contact brushes in the motor.Therefore the life of the motor is simply dependant on the life of the bearing.6. The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.7. It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.8. A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.1Disadvantages1. Resonances can occur if not properly controlled.2. Not easy to operate at extremely high speeds.Open Loop OperationOne of the most significant advantages of a stepper motor is its ability to be accurately controlled in an open loop system. Open loop control means no feedback information about position is needed. This type of control eliminates the need for expensive sensing and feedback devices such as optical encoders.Your position is known simply by keeping track of the input step pulses.Stepper Motor TypesThere are three basic stepper motortypes. They are : Variable-reluctance Permanent-magnet HybridVariable-reluctance (VR)This type of stepper motor has been around for a long time. It is probably the easiest to understand from a structural point of view. This type of motor consists of a soft iron multi-toothed rotor and a wound stator. When the stator windings are energized with DC current the poles become magnetized. Rotation occurs when the rotor teeth are attracted to the energized stator poles.Permanent Magnet Often referred to as a “tin can” or “canstock” motor the permanent magnet step motor is a low cost and low resolution type motor with typical step angles of 7.5 to 15. (48 24 steps/revolution) PM motors as the name implies have permanent magnets added to the motor structure. The rotor no longer has teeth as with the VR motor. Instead the rotor is magnetized with alternating north and south poles situated in a straight line parallel to the rotor shaft. These magnetized rotor poles provide an increased magnetic flux intensity and because of this the PM motor exhibits improved torque characteristics when compared with the VR type.Hybrid (HB)2The hybrid stepper motor is more expensive than the PM stepper motor but provides better performance with respect to step resolution, torque and speed. Typical step angles for the HB stepper motor range from 3.6 to 0.9(100 400 steps per revolution). The hybrid stepper motor combines the best features of both the PM and VR type stepper motors. The rotor is multi-toothed like the VR motor and contains an axially magnetized concentric magnet around its shaft. The teeth on the rotor provide an even better path which helps guide the magnetic flux to preferred locations in the airgap. This further increases the detent, holding and dynamic torque characteristics of the motor when compared with both the VR and PM types.The two most commonly used types of stepper motors are the permanent magnet and the hybrid types. If a designer is not sure which type will best fit his applications requirements he should first evaluate the PM type as it is normally several times less expensive.If not then the hybrid motor may be the right choice.There also excist some special stepper motor designs. One is the disc magnet motor. Here the rotor is designed sa a disc with rare earth magnets. This motor type has some advantages such as very low inertia and a optimized magnetic flow path with no coupling between the two stator windings. These qualities are essential in some applications.Size and PowerIn addition to being classified by their step angle stepper motors are also classified according to frame sizes which correspond to the diameter of the body of the motor. For instance a size 11 stepper motor has a body diameter of approximately 1.1 inches.Likewise a size 23 stepper motor has a body diameter of 2.3 inches (58 mm),etc. The body length may however,vary from motor to motor within the same frame size classification. As a general rule the available torque output from a motor of a particular frame size will increase with increased body length.Power levels for IC-driven stepper motors typically range from below a watt for very small motors up to 10 20 watts for larger motors. The maximum power dissipation level or thermal limits of the motor are seldom clearly stated in the motor manufacturers data. To determine this we must apply the relationship P=V I.For example, a size 23 step 3motor may be rated at 6V and 1A per phase.Therefore, with two phases energized the motor has a rated power dissipation of 12 watts. It is normal practice to rate a stepper motor at the powerdissipation level where the motor case rises 65C above the ambient in still air. Therefore, if the motor can be mounted to a heatsink it is often possible to increase the allowable power dissipation level. This is important as the motor is designed to be and should be used at its maximum power dissipation ,to be efficient from a size/output power/cost point of view.When to Use a Stepper MotorA stepper motor can be a good choice whenever controlled movement is required. They can be used to advantage in applications where you need to control rotation angle, speed, position and synchronism. Because of the inherent advantages listed previously, stepper motors have found their place in many different applications. Some of these include printers, plotters,highend office equipment, hard disk drives, medical equipment, fax machines, automotive and many more.The Rotating Magnetic FieldWhen a phase winding of a stepper motor is energized with current a magnetic flux is developed in the stator. The direction of this flux is determined by the “Right Hand Rule” which states:“If the coil is grasped in the right hand with the fingers pointing in the direction of the current in the winding (the thumb is extended at a 90 angle to the fingers), then the thumb will point in the direction of the magnetic field.”Where we know the magnetic flux path developed when phase B is energized with winding current in the direction shown. The rotor then aligns itself so that the flux opposition is minimized. In this case the motor would rotate clockwise so that its south pole aligns with the north pole of the stator B at position 2 and its north pole aligns with the south pole of stator B at position 6. To get the motor to rotate we can now see that we must provide a sequence of energizing the stator windings in such a fashion that provides a rotating magnetic flux field which the rotor follows due to magnetic attraction.Torque GenerationThe torque produced by a stepper motor depends on several factors.4 The step rate The drive current in the windings The drive design or typeIn a stepper motor a torque is developed when the magnetic fluxes of the rotor and stator are displaced from each other. The stator is made up of a high permeability magnetic material. The presence of this high permeability material causes the magnetic flux to be confined for the most part to the paths defined by the stator structure in the same fashion that currents are confined to the conductors of an electronic circuit. This serves to concentrate the flux at the stator poles. The torque output produced by the motor is proportional to the intensity of the magnetic flux generated when the winding is energized. The basic relationship which defines the intensity of the magnetic flux is defined by:H = (N*i) /lwhere:N = The number of winding turnsi = currentH = Magnetic field intensityl = Magnetic flux path lengthThis relationship shows that the magnetic flux intensity and consequently the torque is proportional to the number of winding turns and the current and inversely proportional to the length of the magnetic flux path. From this basic relationship one can see that the same frame size stepper motor could have very different torque output capabilities simply by changing the winding parameters. Phases, Poles and Stepping AnglesUsually stepper motors have two phases, but three- and five-phase motors also exist. A bipolar motor with two phases has one winding/phase and a unipolar motor has one winding, with a center tapperphase. Sometimes the unipolar stepper motor is referred to as a “fourphase motor”, even though it only has two phases.Motors that have two separate windings per phase also existthese can be driven in either bipolar or unipolar mode.A pole can be defined as one of the regions in a magnetized body 5where the magnetic flux density is concentrated.Both the rotor and the stator of a step motor have poles.Figure 2 contains a simplified picture of a two-phase stepper motor having 2 poles (or 1 pole pairs) for each phase on the stator, and 2 poles (one pole pair) on the rotor. In reality several more poles are added to both the rotor and stator structure in order to increase the number of steps per revolution of the motor, or in other words to provide a smaller basic (full step) stepping angle. The permanent magnet stepper motor contains an equal number of rotor and stator pole pairs. Typically the PM motor has 12 pole pairs. The stator has 12 pole pairs per phase. The hybrid type stepper motor has a rotor with teeth. The rotor is split into two parts, separated by a permanant magnetmaking half of the teeth south poles and half north poles.The number of pole pairs is equal to the number of teeth on one of the rotor halves. The stator of a hybrid motor also has teeth to build up a higher number of equivalent poles (smaller pole pitch, number of equivalent poles = 360/teeth pitch) compared to the main poles, on which the winding coils are wound. Usually 4 main poles are used for 3.6 hybrids and 8 for 1.8- and 0.9-degree types. It is the relationship between the number of rotor poles and the equivalent stator poles, and the number the number of phases that determines the full-step angle of a stepper motor.Step angle=360/ (NPh* Ph)=360/NNPh = Number of equivalent poles perphase = number of rotor polesPh = Number of phasesN = Total number of poles for all phases togetherIf the rotor and stator tooth pitch isunequal, a more-complicated relationship exists.Stepping ModesThe following are the most common drive modes. Wave Drive (1 phase on) Full Step Drive (2 phases on) Half Step Drive (1 & 2 phases on) Microstepping (Continuously varying motor currents)6For the following discussions please refer to the figure 6.In Wave Drive only one winding is energized at any given time. The stator is energized according to the sequence A B A B and the rotor steps from position 8 2 46. For unipolar and bipolar wound motors with the same winding parameters this excitation mode would result in the same mechanical position. The disadvantage of this drive mode is that in the unipolar wound motor you are only using 25% and in the bipolar motor only 50% of the total motor winding at any given time. This means that you are not getting the maximum torque output from the motor.工业电路应用笔记步进电机是一种将电脉冲转换为离散的机械运动的机电装置。步进电机的轴或主轴在离散的步进电机旋转时，在适当的序列中应用电指令脉冲。电机旋转有几个直接关系到这些应用的输入脉冲。所施加的脉冲的序列直接关系到电机轴旋转的方向。电机轴旋转速度与输入脉冲的频率和输入脉冲的长度直接相关。步进电机的优缺点优势1、电机的旋转角度与输入脉冲成正比。2、该电机在静止的具有完全的转矩（如果绕组是通电的） 。3、精确定位和运动的重复性，因为良好的步进电机的精度为 3，5% 的一个步骤，这个错误是从一个步骤到下一步的非累积。4、良好的起动/停止/换向。5、非常可靠，因为在电机里没有接触电刷，因此，电机是完全依赖于轴承的。6、电机响应于数字输入脉冲提供开环控制，使电机更简单，成本更低的控制。7、以实现非常低的速度同步旋转与负载直接耦合到轴是可能的。8、一个宽范围的旋转速度可以实现的速度是正比于输入脉冲的频率。缺点1、如果不能正确地控制，共振会发生。2、在非常高的速度下操作不易。开环运行步进电机的一个最重要的优点是它能够精确地控制在一个开环系统中。开7回路控制装置不需要反馈信息。这种类型的控制，消除了昂贵的传感和反馈装置，如光学编码器的需要，你的位置是已知的，只要跟踪输入步脉冲。步进电机型号有三种基本的步进电机。它们是：可变磁阻永久磁铁混合可变磁阻（虚拟现实）这种类型的步进电机已经有很长一段时间了。从结构的角度看，这可能是最容易理解的。这种类型的电机由一个软铁的多齿转子和一个伤口定子。当定子绕组与直流电流通电时，磁极变磁化。旋转时，转子齿被吸引到的通电的定子磁极。永久磁铁通常被称为“罐头”或“canstock 电机永磁步进电机是一
- 温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
川公网安备: 51019002004831号